*{
    margin: 0 0;
    padding: 0;
}
#toptb{
    width: 100%;
    height: 30px;
    background-color: gray;
}
#z{
    width: 1280px;
    height: 30px;
    margin: 0 auto;
}
#z>a{
    display: inline-block;
    margin: 4px 15px;
}



/* 顶层 */
.header{
    margin: 0 auto;
    width: 100%;
    height: 56px;
    /* background-color: aqua; */
    /* position: relative; */
    display: flex;
}
.nav-link-item{
    /* float: left; */
    /* margin: 2px 30px; */
    /* list-style: none; */
    display: inline-block;
    margin: 0 10px;
    padding: 0 10px;
    height: 100%;
    width: 100%;
}
.nav-link-ul{
    height: 100%;
    /* padding-left: 50px; */
    position: absolute;
    display: flex;
    width: 100%;
    overflow: hidden;
}

.nav-link{
    padding: 3px;
    /* width: 35%; */
    width: 596px;
    height: 36px;
    /* background-color: brown; */
    /* position: absolute; */
    position: relative;
    font-size: 20px;
    /* top: 0;left:0; */
    /* text-align: center; */
    line-height: 30px;
    flex: 0 0 596px;
}
.searchbox{
    /* width: 670px; */
    height: 36px;
    /* background-color:   blue; */
    font-size: 20px;
    position: relative;
    /* text-align: center; */
    /* line-height: 30px; */
    flex: 1;
}
#searchform{
    margin: 0 30px;
    height: 100%;
    width: 90%;
    position: relative;
    display: flex;
}

#srch{
    width: 85%;
    height: 100%;
    position: relative;
    flex: 1;
}
#btn{
    width: 80px;
    height: 100%;
    position: relative;
    flex: 0 0 80px;
}
.header a{
    list-style: none;
    color: white;
    text-decoration: none;
    display: block;
    height: 100%;
    white-space: nowrap;
}
.nac-user-center{
    padding: 3px;
    width: 596px;
    /* width: 35%; */
    height: 36px;
    /* background-color: brown; */
    /* position: absolute; */
    position: relative;
    font-size: 20px;
    /* top: 0;right:0; */
    text-align: center;
    line-height: 30px;
    flex: 0 1 596px;
}
.user-icon{
    margin-left: 50px;
    display: inline-block;
    padding: 3px;
    position: absolute;
    top:0px;left: 0px;
    height: 100%;
}
.usersignin{
    /* margin: 6px 6px; */
    display: inline-block;
    padding: 3px;
    margin-right: 80px;
    position: absolute;
    top:0px;left: 176px;
    display: flex;
    height: 100%;
}
.item{
    display: inline-block;
    margin: 0 10px;
    height: 100%;
}

#banner{
    width:100%;
    height:180px;
    background-image: url("../../images/main/topbg.jpg");
    background-size: 100% 100%;/*按比例缩放*/
    background-repeat: no-repeat;
}

/* 中层 */
#module{
    background-color: green;
    margin: auto auto;
    width: 1280px;
    height: 800px;
    position: relative;
}
table{
    border:8px;
    /* cellpadding:"5";
    cellspacing:"8"; */
    width:100%;
    height:110px;
    /* position: absolute; */
}
td{
    text-align: center;
    vertical-align: middle;
}
#first{
    width: 100%;
    height: 110px;
    background-color: royalblue;
    position: relative;
}
#second{
    width: 100%;
    height: 500px;
    background-color: red;
    /* display: flex; */
    position: relative;
}
.z{
    width: 50%;
    height: 100%;
    background-color: aliceblue;
    /* float: left; */
    position: absolute;
    top: 0px;
    left: 0px;
}
.y{
    width: 50%;
    height: 100%;
    background-color: chartreuse;
    /* float: left; */
    position: absolute;
    top: 0px;
    right: 0px;
}
.z a:first-child img{
    position: absolute;
    top:228px;
    left: 30px;
}
.z a:last-child img{
    position: absolute;
    top:228px;
    right: 30px;
}
#dot{
    width: 200px;
    height: 10px;
    position: absolute;
    background-color: chartreuse;
    top:450px;
    left: 220px;
}
#dot span{
}

@media screen and (max-width: 1400px){
    #srch{
      display: none;
    }
}